All published extension conformance class URLs under api.openeo.org/extensions/* return 404

[alambare]

openEO extension URLs return HTTP 404

All extension URLs published under https://api.openeo.org/extensions/* return HTTP 404.

Examples:

• https://api.openeo.org/extensions/commercial-data/0.1.0
• https://api.openeo.org/extensions/federation/0.2.0
• https://api.openeo.org/extensions/processing-parameters/0.1.0

This breaks schema resolution and validation in tools such as PySTAC, which attempt to fetch extension schemas from the advertised URLs.